body,html
  line-height: 1
  font-weight: 200
  font-family: 'PingFang SC','STHeitiSC-Light','Helvetica-Light',Arial,sans-serif
.clearfix
  display: inline-block
  &:after
    display: block
    content:''
    height: 0
    line-height: 0
    clear: both
    visibility:hidden
//是指当时显示屏最小的色倍为1.5倍的
//https://blog.csdn.net/lny1126/article/details/80538253
//https://blog.csdn.net/cnm3333/article/details/11764011
@media (-webkit-min-device-pixel-ratio:1.5),(min-device-pixel-ratio:1.5)
  .border-1px
    &:after
      -webkit-transform :scaleY(.7)
      transform :scaleY(.7)

@media (-webkit-min-device-pixel-ratio: 2), (min-device-pixel-ratio: 2)
  .border-1px
    &:after
      -webkit-transform :scaleY(.5)
      transform :scaleY(.5)
